Documenent Eventing trust-manager integration

[pierDipi]

Describe the change you'd like to see

Add trust-manager integration, Knative Eventing components will add to the trusted Certificate Authorities (CAs) any PEM-encoded CA certificates in any ConfigMap in the knative-eventing namespace labeled with networking.knative.dev/trust-bundle=true

Additional context

• Trust-manager integration eventing#7532

[ReToCode]

Content might be shared with #5804

[satyampsoni]

/assign

[github-actions]

This issue is stale because it has been open for 90 days with no
activity. It will automatically close after 30 more days of
inactivity. Reopen the issue with /reopen. Mark the issue as
fresh by adding the comment /remove-lifecycle stale.

[pierDipi]

/remove-lifecycle stale